Electrical oscillation generator



L. F. FULLER.

ELECTRICAL OSCILLATION GENERATOR.

APPLICATION FILED JUNE 16. 1919.

1,424, Patented July 25,1922.

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LnonAnnF. FULLER, or IPALO ALTO, CALIFORNIA, Assrsnon TO AUGUSTUS TAYLOR, or SAN FRANCISCO, CALIFORNIA.

ELECTRICAL OSCILLATION GENERATOR.

T 0 all 20 ham it may concern Be it known that I, LEONARD F. Furmnn, a citizen of the United States, and resident of Palo Alto, county of Santa Clara, and State of California, have invented certain new and useful Improvements in Electrical Oscillation Generators, of which the following is a specification.

The invention relates to electrical oscillation generators for use in radio transmission systems, such as is shown in my prior United States Letters Patent No. 1,298,490 issued March 25, 1919.

In oscillation generators of this character, the cathode is carbon and the anode is metal, and during the operation of the generator, when the hydrocarbon atmosphere in which the arc is formed has a high carbon content, carbon teats occasionally form on the end of the anode, which vary the length of the arc gap and interfere to some extent with the proper operation of the generator. On account of the great heat generated by the arc, the metallic anode is water cooled, and there is a possibility of steam pockets forming in the interior of the anode which would interfore with the proper cooling of the anode tip.

An object of this invention is to provide a cheap, rugged and reliable anode tip for are converters.

Another object of the invention is to provide an anode tip which will have a minimum of carbon teats formed thereon.

A further object of the invention is to provide a water-cooled anode tip through which the cooling water runs at high velocity close to and in direct thermal contact with the surfaces upon which the arc flame plays.

The invention possesses other advantageous features, some of which, with the fore going, will be set forth at length in the following description, where .i shall outline in full, that form of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. In said drawings I have shown one embodiment of my invention, but it is to be understood that I do not limit myself to such form, since the invention, as expressed in the Specification of Letters Patent.

Application filed June 16, 1919.

Patented July 25, 1922;

Serial No. 304,600.

claims, forms.

Referring to said drawings:

. Figure l is a plan view of the oscillation generator of my invention, the arc chamber being shown in section.

Fig. 2 is a side elevation of the anode of my invention.

Fig. 3 is a vertical section through the anode tip.

Oscillation generators or are convertors of this character comprise a closed chamber 2 containing an atmosphere containing hydro gen, in which is arranged the cathode 3', usually formed of carbon and the anode 4, preferably formed of copper. The anode and cathode are spaced apart at their adjacent ends and an arc is produced between these ends. The arc is subjected to a strong transverse magnetic field produced by the electro-magnets 5, the poles 6 of which are may be embodied in a plurality of disposed within the chamber, border toproduce as strong a magnetic field as possible with given sized electro-magnet coils, the poles 6 are disposed close to the cathode 3. The anode at is narrower than the cathode, so that the distance between the anode and the poles is a maximum.

The anode tip of my invention consists of a looped or bent tube 7, preferably of copper, which has a smooth curved surface, free from sharp edges or projections, so that the arc plays over a smoothly curved surface. The tip is formed of a tube, bent back on itself in a smooth curve, and is provided with a continuous Water passage 8, of uniform cross section at its forward end, and water is caused to flow through the tube at. high velocity, thereby effectively cooling the tube. The tube is preferably provided with a renewable U-shaped end 9, but this arrangement is not essential to the operation of the generator. The ends of the tube project from the chamber and suitable flanges and nuts are provided for closing the aperture through which the ends pass. Cooling water flows into one end of the tube, passes rapidly through the looped tube and discharges from the other end.

All of the operating surfaces of the tube, that is, those surfaces on which the arc plays, are nicely curved and smooth, so that if magneticair gap and there is less tendency fo'rthe flame to jump from the anode tip to the magnetic pole pieces Another advantage, due to the smooth rounded surface, with allsharp edges and corners eliminated, is that the voltage required to are over from the anode to the magnetic pole piece is increased;

I claim:

1. In an electrical oscillation generator, an anode tip comprising a U-shaped metallic tube having a smooth curved surface.

2. In an electrical oscillation generator, an anode tip comprising a U-shaped metallic tube having a smooth curved surface and a continuous bore for the rapid circulation of cooling liquid.

3. In an electrical oscillation generator, a pair of main electrodes adapted to produce an arc, one'of the electrodes being ofmetal and serving as an anode and having'a cooling liquid passage of uniform. cross section entirely therethrough for circulating the liquid, the anode also presenting a smooth, curved surface to the other electrode, said other electrode being of carbon.

4. In an electrical oscillation generator, an anode tip comprising a U-shaped metallic tube having a smooth curved outer surface, and a continuous bore of relatively small cross section, whereby cooling liquid may flow at high velocity in contact with the heated portions of the tube.

5,. Inan electrical oscillation generator, a carbon cathode, a U-shaped metallic tube havinga smooth curved outer surface and a continuous bore for cooling liquid arranged adjacent the cathode and comprising an anode, the arc being formed between the cathode and the curved end of, the anod and magnetic poles arranged on opposite sides of the gap between the anode and cathode.

6. In an electrical oscillation generator, an anode tip comprising a U-shaped metallic tube having a smooth curved outer surface at the U-shaped portion and provided with a continuous bore for cooling liquid past the U-shaped portion, so that the cooling liquid flows past the U-shaped portion with substantially equal velocity at all points.

7. In an electrical oscillation generator, anbanode tip comprising a U-shaped metallic tu e.

In testimony whereof, I have, hereunto set my hand at v Palo Alto, California, this 29th day of May l9l9.-

LEONARD F. FULLER.

In presence of- MARY H, BULEN, THELMA KNOX. 

